[gtk/a11y/component: 4/4] atspi: Emit bounds-changed when the size changes

[Matthias Clasen <matthiasc src gnome org>]

commit c3d92ce79f170b445094017ea9002aaf23930fbe
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Oct 13 21:22:33 2020 -0400

    atspi: Emit bounds-changed when the size changes
    
    This is using the newly added platform state
    for the widget size.

 gtk/a11y/gtkatspicontext.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
---
diff --git a/gtk/a11y/gtkatspicontext.c b/gtk/a11y/gtkatspicontext.c
index 99987d6250..e6766ed411 100644
--- a/gtk/a11y/gtkatspicontext.c
+++ b/gtk/a11y/gtkatspicontext.c
@@ -781,6 +781,23 @@ emit_property_changed (GtkAtSpiContext *self,
                                  NULL);
 }
 
+static void
+emit_bounds_changed (GtkAtSpiContext *self,
+                     int              x,
+                     int              y,
+                     int              width,
+                     int              height)
+{
+  g_dbus_connection_emit_signal (self->connection,
+                                 NULL,
+                                 self->context_path,
+                                 "org.a11y.atspi.Event.Object",
+                                 "BoundsChanged",
+                                 g_variant_new ("(siiva{sv})",
+                                                "", 0, 0, g_variant_new ("(iiii)", x, y, width, height), 
NULL),
+                                 NULL);
+}
+
 static void
 gtk_at_spi_context_state_change (GtkATContext                *ctx,
                                  GtkAccessibleStateChange     changed_states,
@@ -953,6 +970,19 @@ gtk_at_spi_context_state_change (GtkATContext                *ctx,
                                                           GTK_ACCESSIBLE_PLATFORM_STATE_FOCUSED);
       emit_state_changed (self, "focused", state);
     }
+
+  if (changed_platform & GTK_ACCESSIBLE_PLATFORM_CHANGE_SIZE)
+    {
+      double x, y;
+      int width, height;
+
+      gtk_widget_translate_coordinates (widget,
+                                        GTK_WIDGET (gtk_widget_get_root (widget)),
+                                        0, 0, &x, &y);
+      width = gtk_widget_get_width (widget);
+      height = gtk_widget_get_height (widget);
+      emit_bounds_changed (self, (int)x, (int)y, width, height);
+    }
 }
 
 static void